package lab02.Test20;

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        System.out.println("请输入字符串：");
        Scanner in=new Scanner(System.in);
        String str=in.nextLine();
        //StringBuffer s=new StringBuffer(str);
        for (int i=0;i<str.length();i++){
            char tmp=str.charAt(i);
            if (tmp>='a'&&tmp<='z'){
                System.out.print("");
            }else if(tmp>='A'&&tmp<='Z'){
                System.out.print("");
            }else {
                System.out.print(tmp);
            }
        }
    }

}
